| 초록 |
In this study, the shape of liquid crystal elastomer was permanently modified through dynamic exchange reaction. Uniform-sized microparticles was fabricated by microfluidics method using the elastomer which was synthesized by thiol-ene click reaction followed by S-S coupling reaction. Then the droplet was pressed into pancake shape. With the exposure to the ultraviolet light, this pancake-shape was firmed at room temperature (RT) by dynamic exchange reaction. The external force led to the elastomer orientation, which could be changed according to the temperature. Therefore, when heat was applied above the isotropic temperature, the orientation became random, the droplet expanded and recovered to the original sphere shape. On the contrary, when the droplet was cooled down again, it shrank as it regained orientation and recovered to the original shape. Through this, the elastomer was permanently deformed at RT and the shape could be reversibly transformed according to the temperature. |
